CVE-2021-23434

Name: CVE-2021-23434
Creator: NVD / NIST
Published: 2021-08-27T17:15:06.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 1.90%

Last modified Jun 17, 2026

CVE-2021-23434 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. EPSS estimates a 1.90% chance of exploitation in the next 30 days.

Description

This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === '__proto__' returns false if currentPath is ['__proto__']. This is because the === operator returns always false when the type of the operands is different.

Metrics

CVSS 3.1

8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

EPSS Probability

1.90%

77.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-843

Affected Software

Vendor	Product	Versions
Object-Path Project	Object-Path	< 0.11.6
Debian	Debian Linux	10.0

References

https://github.com/mariocasciaro/object-path%230116Broken Link
https://github.com/mariocasciaro/object-path/commit/7bdf4abefd102d16c163d633e8994ef154cab9ebPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00031.htmlMailing List, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1570423Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-OBJECTPATH-1569453Exploit, Third Party Advisory
https://github.com/mariocasciaro/object-path%230116Broken Link
https://github.com/mariocasciaro/object-path/commit/7bdf4abefd102d16c163d633e8994ef154cab9ebPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00031.htmlMailing List, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1570423Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-OBJECTPATH-1569453Exploit, Third Party Advisory

Timeline

Published: Aug 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23434?

How severe is CVE-2021-23434?

CVE-2021-23434 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.90% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23434?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-23434?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST